An aluminum electrolytic capacitor

Abstract

Disclosed is an aluminium electrolytic capacitor, comprising a core cladding having a polarity leading-out wire, a polarity leading-out wire guide pin led out from the core cladding, and an encapsulating metal housing enclosing the core cladding. Sandwich layer design is adopted at the bottom of the encapsulating metal housing; an explosion-proof gasket is arranged between the bottom of the encapsulating metal housing and the bottom of the core cladding; an air passage is formed between the explosion-proof gasket and the bottom of the core cladding and the encapsulating metal housing; and an airflow is buffered via the air passage when the aluminium electrolytic capacitor explodes, thereby reducing the impact generated by the explosion and effectively filtering aluminium foils and isolation paper fragments, so that only steam gas is safely released and depressurized finally without causing the spurting of electric sparks. The present invention is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolytic capacitors, in particular to an explosion-proof and safe aluminum electrolytic capacitor. Background technique [0002] The packaging of wet-type aluminum electrolytic capacitors is formed by pressing and sealing the explosion-proof aluminum shell and sealing rubber particles, and the internal vapor pressure release is completed by the pressure relief valve (such as: aluminum film or rubber film). The latter has the ability to automatically release the peak value of the internal vapor pressure (threshold value), and the built-in pressure relief valve can effectively meet the safety requirements of electronic circuits under normal working conditions. However, there is nothing that can be done to prevent failures such as capacitor frying and burning. Through statistics on the failure cases of aluminum electrolytic capacitor products at home and abroad, it is found that the same feature...

AI Technical Summary

Problems solved by technology

However, there is nothing that can be done to prevent failures such as capacitor frying and burning. Through statistics on the failure cases of aluminum electrolytic capacitor products at home and abroad, it is found that the same feature of most frying products is that the internal battery structure of the capacitor is blown out, resulting in a large area of ​​circuit board short circuit. The larger the capacitor, the larger the damaged area of ​​the circuit board, and there may even be serious accidents such as burning the machine. For expensive electrical appliances or high-level fire safety places, all aluminum electrolytic capacitors currently have such hidden dangers.

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